Improvement in type-writing machines



2 Sheets-Sheen.

B. ARNOLD.

TYPE WRITING MACHINE.

No.175,584. Patented Apr i1L1 876.

Fig. 2

ER Pnormumoemwsn. msumemm 0 c.

2 Sheets-Sheet 2.

B. ARNOLD. TYPE WRITING MACHINE.

Patented April 4. 3.876.

Fig. 4

INVENTORI WITNESSES N.FETERS, PROTOLITNOGRAPMER. WASHKNGTON, 0 c

' fore the marker.

Unrrnn STATES PATENT BENJAMIN ARNOLD, OF EAST GREENVVIOH, RHODE ISLAND.

IMPROVEMENT IN TYPE-WRITING MACl-HNES.

Specification forming part of Letters Patent No. 375,584, dated April 4,1876; application tiled October 15, 1875.

To all whom it may concern:

Be it known that I, BENJAMIN ARNOLD, of'

East Greenwich, in the county of Kent and State of Rhode lsland haveinvented certain movement of the lever that turns the shaft.

A plate in the form of a segment of a circle is in front of the rolls,with notches made in it, to correspond with the position of the type, sothat when the lever is moved into a notch it will indicate what letteris presented be- It also consists in certain feed-motions hereinafterexplained.

Figure 1 is a front elevation. Fig. 2 shows a top view. Fig. 3 isavertical section from front to back in line or a, Fig. 2. Fig. 4 is aview of left side of Fig. l.

A is a bed or table, surmounted by a bridge, D, upon which the carriageF slides from one side to the other, andcarries the feedaolls a a. Anupright shaft,-O, is held by the standard K back of the rolls, and thetype or letters i are fastened or made on the plate 0, which is fast tothe shaft 0.

A lever, S, pinned to a sleeve, h, sliding on the shaft, turns the shaftby means of a pin, 11, passing through a slot in the sleeve. The backend of the lever S is notched onto a curved rim, L, which serves as afulcrum for the lever, and allows it to swing around with the shaft 0.

Another lever, N, also pinned to a sleeve,

0, which slides on the shaft 0, but does not turn with it, is pivoted tothe standard K, and moves the carriage F by the inclined lever b,pivoted to the bridge a pawl, a, on the lever catching into ratchetteeth on the carriage. The lever N also moves the marker 8 by theconnecting-rod R. The two sleeves c and h are connected together by aswiveljoint, that allows the lower one to turn with the shaft on whichthey slide, while the upper one does not, but is merely moved up anddown by the lower one, to convey motion from one lever to the other.

A standard, J, holds in its upper end a short'shaft, V, in the end ofwhich is the marker s, which consists of a piece of type-metal, or othersubstance that will mark the paper by rubbing over a figure placedbehind it. The marker is thrown forward against the paper by an inclineor canny, on its shaft, and a corresponding one on a spring, t, throughwhich the shaft passes. A set-screw, c, that bears against the springt,increases or lessens the pressure upon the marker, as may be desired,and a light spring around the shaft V, between the standard and the arm1', draws the marker back from the paper.

The two rolls a a are geared together, and are turned so as to feed thepaper up between them by a knee-lever, 1, see Fig. 4, working on a pivotin the end of the carriage, the lower end of the lever being presseddown by the spring 3 when it is not on the incline m. The upper arm ofthe lever carries a paivl, that catches into a ratchet-wheeLd, fast onone of the rolls. The pawl g catches into the same wheel and holds itfrom turningback.

A plate in the form of a segment of a circle,

B, raised from the table, is notched to correspond with the letters onthe plate 0, and so placed that its center shall be at the shaft 0, andletters marked under the notches to agree with those on the plate 0.

The operation is as follows: The carriage F being at the right end ofthe bridge, the sheet of paper is fed up between the rolls by turningthehcrank f until it is above the plate 0; then, by swinging the leverS, which is supposed to be raised, over the notch and letter on thecircle B thatis desired to print, the shaft 0 will be turned and thesame letter on the plate 0 brought in front of the marker 8. The leveris now pressed down into the notch. This draws down the lever N, andturns the marker by the connecting-rod R. The first part of the turningmotion of the marker throws it forward against the paper by oneoftheinclines or cams before mentioned sliding upon the other; then theother part produces a rubbing motion ofthe marker on the paper over thetype, so as to produce on the face of the paper a fac-simile of theletter FFIGE. I

behind it. The lev er Sis now raised, pushing up the lever N. This movesthe inclined lever I) over to the left, and feeds the carriage in thatdirection the proper distance for the next letter by the pawl n, whichwas thrown back when the lever S was depressed. When a line is printedacross the sheet by a succession of these motions, by pressing 011 thelever Y the pawl n will be raised, and the carriage may be pushed backto the right side again, and on its way the incline at will raise thelever l, and, by means of the pawl and ratchetwheel d, turn the rollsand feed the paper up the proper distance for the next line of letters.

-To justify with regard to the different spaces required by differentletters, the notches in the curved plate B are made more or less deep toalter the feed, and they (the notches or the letters on the plate (J)are varied in distance between their centers. For instance, the letterIf requirin gless space, has its notch in the curved plate B made alittle to the left, so that when the lever S is in that notch the centerof the letter I on plate 0 shall be a little to the left of thecenter ofthe marker, so that it will be printed a little nearer the last letter;then, as the l notch is less in depth, the lever S willnot go down sofar, and the pawl n will not take back so many teeth in the ratchet, andwhen the lever S is raised the carriage F will not be moved so far forthe next letter, so that it will be printed nearer to thel or the I onthe plate 0 may be placed to the left a little, instead of the notch inthe curve B. For a wide letter, like W, the notch in the curved plate Bis made a little to the right, so that letter will be printed a littlefarther from the last letter, and the notch is also made a littledeeper, so that the carriage F shall move a little farther for the nextletter, and allow W more space on that side. This mode, only varied indegree, applies to the other letters.

The rolls a a may be covered with rubber or other suitable substance tohold the paper securely, and two or more copies may be printed at thesame time by putting two or more sheets of paper with sheets ofcarbonized or copying paper between them in the rolls. The front sheet,being printed by the marker, shows at any time up to the last let markerplaced above them, substantially as and for the purpose set forth.

2. The letter-plate O, in combination with a marker that will color thepaper without the intervention of any other substance, substantially asherein set forth, and for the purpose specified.

3. A marker workin'g with a longitudinal reciprocating and a rotaryreciprocating motion, in combination with type or raised letters,substantially as and for the purpose set forth.

4. The shaft V, pivoted with the cam j, in combination with the lever S,lever N, and connecting mechanism, substantially as and for thepurposespecified.

5. The lever 11 and pawl n, in combination with lever N and carriage F,substantially as and for the purpose specified.

6. The adjusting-spring t, shaft V, screw 0, and standard J, combinedand operating substantially as specified.

7. In a type-writing machine, the notched curved plate B, with thespaces between the notches varying in width, according to the spacerequired by the different letters represented by them, substantially asdescribed, and for the purpose set forth.

BENJ. ARNOLD.

Witnesses:

H. A. ARNOLD, L. P. ARNOLD.

